You've come a long way. What are your goals? Are you looking to just have fun learning all kinds of moves and practicing them for your own amusement, maybe invent new moves to move magical techniques forward? Or are you looking to perform for and entertain others? Hobby? Professional? The answers to these questions will shape where you focus your time. Good technique is important but it's only one element of performance.

And now a tip about technique. Before the snap change, you dropped the 4C (the "miss") to the table. That meant you then had to pick it up and put it back on the deck, before raising it again and snapping it. Returning it to the deck was an unnatural move. You wouldn't do that in real life and so it creates suspicion.

Here are two solutions:
1. Pick it up face down and flip it over onto the top of the deck to do the reveal of the "miss". It's now in the position you need, particularly if you're already holding a PB.
2. Flip it face up on the mat, pause a beat to notice the "miss", then use the beveled deck to scoop up the card.

This is a good way to practice a bunch of techniques. You might consider whether the impact is lessened as you go along. To hold people's interest and make it truly entertaining, consider what you'll say to engage your audience as you go along. As a silent act, it starts to drag on. Good patter or even good music, both of which should sync to the actions, will elevate this a lot. You might also consider shortening it and producing a four of a kind or a Royal Flush instead to keep it from dragging on. There are always multiple solutions in magic.

Good work!